diff --git a/.ruby-version b/.ruby-version
index a4dd9dba..a603bb50 100644
--- a/.ruby-version
+++ b/.ruby-version
@@ -1 +1 @@
-2.7.4
+2.7.5
diff --git a/Dockerfile b/Dockerfile
index 35b84a2e..ac9a8c21 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:2.7.4
+FROM ruby:2.7.5
 
 ENV LANG=C.UTF-8
 ENV ENABLE_SERVICE_WORKER=true